NuAire MEV-M Installation And Maintenance Manual

NuAire MEV-M Installation And Maintenance Manual Manual pdf 1 page image

Contents PageIntroduction 1Codes 1Dimensions 2Installation 2Adjustments 3Installing / Removing the blowers 3Optional Fault Indication 4Electrical data 4Wiring Diagrams 4Certification 5Maintenance 6Spares & Service 6NuAire Home VentilationWestern Industrial Estate Caerphilly,CF83 1XH United Kingdom.Telephone: 08705 002555Facsimile: 08705 002666Email: info@nuaire.co.ukwww.nuaire.co.ukLeaflet 671123JULY 2001MEV-M unitsContinuous Mechanical ExtractVentilation UnitsNOTE:THIS UNIT IS DELIVERED WITH THE BLOWERSECTION PACKED ‘LOOSE’ INSIDE THE CASEFOR FIXING SEE PAGE 2IntroductionNuAire's MEV-M units are designed to be installed into duct-work above the area to be ventilated (usually in the ceiling void).The units provide mechanical extract ventilation for homes inaccordance with BRE digest 398. Single, twin and dual fan unitsare availableThe case is constructed in galvanised steel. Internal faces of thecasing are acoustically lined. The full length access cover isretained by four screws. An integral fixing bracket with a singlescrew fixing allows easy mounting and removal of the unit whennecessary. The unit is delivered with the 200mm dia dischargespigot fitted.Various ‘knockout’ inlet spigot positions can be utilised. All inletspigots are ’closed’ as knockouts when delivered. A full kit ofinlet spigots with integral balancing dampers is supplied baggedseparately.The inlet spigot locations are as follows:One x 150mm end knockout.Two x 100mm knockouts on LH side of case.Two x 100mm knockouts on RH side of case.Any, or all, of these inlets can be utilised. User removes theknockout(s ) and fits the balancing spigot(s) supplied.A filter frame with a replaceable filter is ‘push fit’ located insidethe case which is easily removed for cleaning following removalof the case cover.The fan is designed to be wired direct to the mains supplythrough a fused spur isolator (by others) and run continuously inthe NORMAL mode (which is the low speed or trickle ventila-tion setting). The degree of extract from each room served can beadjusted with the inlet balancing spigots.The unit is provided with adjustment for the trickle (low speedor NORMAL) and high speed (BOOST) ventilation as standard.The NORMAL speed adjustment has a range of 0% to 50%.The unit is delivered with the NORMAL speed adjustment set to0%. Note: the NORMAL speed must be set to 25% by theinstaller.An adjustment of 50 -100% is provided for the ‘BOOST’ dutysetting to reduce performance if necessary.The unit is delivered with the BOOST speed adjustment set to100%. (See the adjustments information on page 3). A manualremote switch is provided to activate the NORMAL and BOOSTfunctions (see fig. 2).Provision is also made for the wiring in of an optional remote failindicator (not supplied). Order item HVCT-AVI.CodingMEV-M Single fan unitMEV-2M Twin fan unit (with auto duty sharing)MEV- M+ Dual fan unit (both fans continuous running)DutyUnits are available with one or two fans and with the followingduties:100 l/s (MEV-M & MEV-2M)The MEV-M has a single fan and delivers 100 l/sThe MEV-2M has two fans and delivers 100 l/s with automaticduty sharing to extend unit operational life. Also the unit willswitch to the ‘standby’ fan in the event of a fan failure.150 l/s (MEV-M+).The MEV-M+ has two fans which run continuously and deliver150 l/s. In the event that one fan fails, the other will still deliver100 litres as a single fan until the unit is serviced.Installationand Maintenance1Fig. 1.General view of unit.IMPORTANT WARNINGInstallation and servicing MUST be carried outby electrically quaIified personnel.The unit MUST BE TOTALLY ISOLATED from theelectrical supply before removing covers.NOTE internal input socket will be exposed andMAY BE LIVE with the fan module removed.See ‘ISOLATION’ notes.